October 20th, 2008, 08:04 AM
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 geometric Sequence
(b) Consider the following geometric sequence. 400 , 320 , 256 , 204 .8, ... (i) Write down a recurrence system that describes this sequence. (Denote the sequence by xn,and itsfirsttermby x1.) [ 2] (ii) Find a closed form for this sequence. [ 2] (iii) Use the closed form from part (b)(ii) to find the tenth term of the sequence, giving your answer correct to four decimal places. [ 2] |